TWhen you finally commit to building that treehouse you always wanted, it's wise to organize your ideas in a blissfully chaotic diagram first. This process is called the mind mapping stage. Our advice is to avoid considering the stogy and unproductive notions of City & County Permitting, overall safety, and liability. Bah. Instead, consider the philosophical pillars of treehouse construction: "How/where will your FOOD, ENERGY and FUN be made in said treehouse?" or F.E.F. for short. Make it happen people!